Solar-powered calculators

[Dave Britten]

(04-28-2020 09:00 PM)Albert Chan Wrote:  

(04-28-2020 07:27 PM)Dave Britten Wrote:  [*]TI BA-35 Solar - Basic financial calculator with TVM, amortization, cost/sell/margin, percent and percent change, nominal/effective interest rate conversions, and one-variable stats.

Actually, TI BA-35 Solar does 2-variables stats.
I use its interpolation a lot. Example, interpolate from 2 points (10,20), (20,100)

[MODE] // to stat mode
10 [X<>Y] 20 [Σ+]
20 [X<>Y] 100 [Σ+]
12 [Y'] → 36
36 [X'] → 12
[b/a] -60 // y-intercept
[X<>Y] 8 // slope -> Y = 8X - 60

Yup, you're right, I missed the x' and y' functions on the left. It looks like it only has a subset of 2-variable stat functions, though, unless there's some non-obvious way to get the actual summation register values.